Year	current US$
1966	183.95722741111763
1967	120.31087727126632
1968	158.8944765790623
1969	158.65384615384616
1970	204.1964360645839
1971	318.5833295186358
1972	437.9282795575514
1973	580.8560263785868
1974	473.6641163134389
1975	488.377351580926
1976	346.9403110333343
1977	573.970570283778
1978	836.4363791725818
1979	1073.2851544872492
1980	1413.566592079279
1981	1052.7164260003156
1982	1088.949922183315
1983	1223.2682844417218
1984	860.600029718668
1985	941.2107162006346
1986	1312.9329287441435
1987	1760.9346098617634
1988	1595.4781918943845
1989	1687.2581223472782
1990	1769.52471145009
1991	1771.6494604063653
1992	1991.0011234007309
1993	2139.504439046527
1994	2155.508136265086
1995	2328.0327292642405
1996	2005.1224648642367
1997	1682.1734270234983
1998	1648.439512314645
1999	1503.2933253301644